Modulating telephone-receiver.



No. 848,073. PATENTE'D MAR. 26, 1907.

K. M. TURNER.

MDULATING TELEPHONE RECEIVER.

APPLIGATION FILED JAN. 13, 1906Y @f MC1/mwen I ann/Moz ,W @wm- Telephone-Receivers, of which sTATEs PATENT oEEIGEg? "KELLEY TUR-'NEVE or NEW YoRKgnY.

f wloDuLATlNcs Tri,LEPi-iomE-FcE'CEIVER. i

To will whom t may concern;

Be it known that I, KELLEY M. TunNER,'a

citizen of the United States, residing at New' York city, in the borough'of Manhattan and State of New York, have invented certain new and useful Improvements Modulatingis afull, clear, vandexact description.4 A

My* invention relates to telephone -receivers, and more particularlyto receivers for the use of deaf persons in connection with the .acousticon and other apparatus where justment to modulate the toneis elfected in a 'des simple and convenient way, and in which the 'orlginal orpermanent adjustment obtained when the instrument is assembledis not in:

i .terfered with or impaired.

' Withl these and otherobjects in vView my invention consists in the construction, com- Fig. '3 is a view looking toward the inside of bination, location, and arrangement of parts, 3o

as hereinafter 'set forth and shown,`and finally particularly pinted out in the appended claims.

In the drawings, vFigure 1 is a front eleva-` tion orface view of a receiving instrument embodying the principles of vmy invention. ig. 2 is a vertical sectional view of the same.

the cover. Fig. 4' is a view of the damping member which I employ, and F ig. 5 isa simi` lar view of the same looking from the oppositeside. f

The original adjustment of a telephonereceiver is made to suit the practical conditions required and in the case of instruments adapted for deaf persons is adjusted to give a considerable intensity of sound. What` ever the adjustment made, it isA very difficult to change after once being completed at the factory. Any attempt todo this-is liable to disarrange thewholc apparatus. As is well known, the diaphragm vibrates in.exceed ingly close proximity to the magne t-poles and is held in such position by the cover ofthe instrument, which also clamps it rigidly, and any attempt to remove the cover to change. the adjustment would loosen the diaphragm,

Specification of Letters Patent. Application fiiaimw 13,1996. sean No. 295.834.l

the following Patented 'March 26, 1907.

4cluding any exact readjustmen't except at the hands of a 'skilled' expert. By the present invention I permanently assemble the parts lation .and subsequently vary ormodulate .or impair the loriginal adjustment. In this way the .receiver may lbe adjusted to the needs-0f personsof varying degrees of deafnessor to the'needs of any one person'under the stages of lis gradual improvement. lmay also be 4conveniently manipulated durlrestoredv exactly to its origina] Conditions When'desired."

,sign 1 indicates a frame or casing comprising athreaded'engagement .4, -bywhich it issecured to the box. .5 designates the usual permanent magnetshaving centrally-pro-A j jected poles, and"7l denotes'the usual magnet -spools or' bobbins vwound thereon by which the telephonic'im `ulses are made effective to vibrate the diap ragni. The diation' etween the box and washers 9 beneath the cover 3. In this-way the diaphragm is rigidly clamped in a position in intimate proximity to the magnet-poles 6. These fe atures -torni. the construction of the usual telephone-receiver and forml n o partof'my present invention. l

Supported bythe cover I provide what I s hall term a damping-pad, anda convenient form of this device is illustrated in the drawings, particularly in Figs. 4 and 5 thereof. In these :figures the damping-pad comprises a disk 10, having a cylindrical collar 11 projecting therefrom and adapted to enter and engage the usual listening-orifice 12 in the cover-plate.

13 designates lugs upon theface of the disk 10, adapted to engage corresponding cam-recesses 14 on the interior face of the cover.4 'lhe relation is such that the lugs 13 ride upon and are cammed inward by the camrecesses 14 when the damping pad or disk is circumferentially vturned through a slight distance.`

15 designates a hook-shaped handle projecting from the disk 10 and extending through a curved slot or aperture 16 in the -ing certain kinds of weather to soften thev sound thereof. lIn any case it can always be Referring u) the. drawings, in which like' parts are designated` bythe same reference-A phragm is shown at 8in rigidly-clamped relainto thev proper adjusted and clamping re-l j the soundby a means which does not-effect It i a main or box portion 2 and' a' cover 3,having ICO character thereof.

coverplate. I form the edges of this slot or orifice 16 chamiered or beveled on their exterioi side, as indicated at 17, so as to permit a more convenient engagement of the hook or handle 15.

18 denotes springs upon the interior face of the cover which extend over the disk 10 and hold the same in place.

By 'the means above described the damping-disk 10 is supported in substantially concentric relation witlrthe diaphragm 8 and movabletoward and from the same by the movements of the hook or handle 15. The

face of the disk 10 is provided with a pad of rubber or other iibrous or packing materia-1 19 in a relation to directly contact with and engage the diaphragm.

The operation is as follows: The instrument is originally assembled and adjusted for the loudest tone required in practice, corresponding to very deaf persons, or to certain atmospheric conditions, and in this relation the damping pad or disk 10 is turned so that its edges are engaged by the innermost parts of the cam-recess`es 14 and the damping-pad is entirely out of contact with the diaphragm. If the atmospheric conditions vary or the person using the instrument experiences an unpleasant intensity in the sound, it is merely necessary to turn the hook or handle 15 slightly within its containing slot, so that the dam ing-pad 19 moves into ressing relation to t ie diaphragm. It is to c understood that the diaphragm is suiliciently stiff to maintain its proper distance from the magnetic poles 6 under these circumstances, the eiiect of the damping-pad being merely to impede the vibrating movement of the diaphragm, so as to diminish the intensity of the sound without changing the At any time it is always possible to restore the' instrument to its Original condition by moving the hook or handle 15, so as to entirely withdraw the dampingpad from contact with the diaphragm, whereuponl the latter willbe free to vibrate under A the conditions of its originaladjustment.

VVh'ile I have set forth this particular form of damping-pad with cam means for moving it, I do not desire to be limited or restricted to the particular Jform shown, since these details Amay be widely modified in practice and still fall within the spirit and scope ofthe invention.

1. In a telephone-receiver having a diaphragm, a, damping-pad having cam-lugs thereon and means whereby said cam-lugs are made'eiiective to press the damping-pad into contact with the diaphragm.

2. In a telephone-receiver having a diaphragm, a damping-disk having avcollar revolubly. supported by the receiver and having lugs, cam-recesses operating with said lugs and a handle for turning said damping-disk whereby it is brought into contact with the diaphragm.

3. In a telephone-receiver having a' diaphragm, a pad of yielding material 1n proximity thereto, and cam means for moving .said pad into contact with the diaphragm.

, 4. Ina telephone-receiver having a diaphragm, an annular pad of yielding or fibrous material in proximity to the central portion thereof, and cam means for moving said p'ad against the face of said diaphragm.

5. In a telephone-receiver having a diaphragm and having a cover-plate with the usual soundforifice opposite'said diaphragm, an annular ad of ii rous material engaging the oriceo said cover-plate and cam means for turning said pad, whereby it is moved into contact with the diaphragm In witness whereof I subscribe my signa-.

ture in the presence of two witnesses. y

' KELLEY M.TURNER.

Witnesses:

WALDO M. CHAPIN, FRANK S. OBER. 

